[jira] [Created] (HIVE-18021) Insert overwrite on acid table with Union All optimizations

["Eugene Koifman (JIRA)" <ji...@apache.org>]

Eugene Koifman created HIVE-18021:
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             Summary: Insert overwrite on acid table with Union All optimizations
                 Key: HIVE-18021
                 URL: https://issues.apache.org/jira/browse/HIVE-18021
             Project: Hive
          Issue Type: Bug
          Components: Transactions
    Affects Versions: 3.0.0
            Reporter: Eugene Koifman


This is a followup from HIVE-14988.
T is unbucketed acid table
{noformat}
insert into T select a,b from S union all select a,b from S1
{noformat}
will create a separate subdirectory for each leg of the union in the target table
(automatically on Tez, with some props enabled on MR)
Regular Insert will make each subdirectory be a delta_x_x_0, delta_x_x_1.  See HIVE-15899.
There is no such suffix mechanism for base_x/.  

Need to figure how this should work.







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